The operating frequency of three phase AC system in the U.S. is
The operating frequency of three-phase AC system in the U.S. is:
- 100 Hz
- 80 Hz
- 60 Hz
- 50 Hz
Correct answer: 3. 60 Hz
The operating frequency of three-phase AC system in the U.S. is:
Correct answer: 3. 60 Hz